FreeBSD Listen Queue Overflows - can't increase max queue size

Posted by Harry on Server Fault See other posts from Server Fault or by Harry
Published on 2012-10-29T15:25:10Z Indexed on 2012/10/29 17:04 UTC
Read the original article Hit count: 520

Filed under:

nginx

|

freebsd

|

tcp

|

kernel

|

netstat

I have a decently high trafficked FreeBSD Nginx server, and I'm starting to get a large number of listen queue overflows:

[root@svr ~]# netstat -sp tcp | fgrep listen
80361931 listen queue overflows
[root@svr ~]# netstat -Lan | grep "*.80"
tcp4  192/0/128        *.80
[root@svr ~]# sysctl kern.ipc.somaxconn
kern.ipc.somaxconn: 12288
[root@svr ~]#

However I can't seem to increase the max listen queue length past 128. I've increased kern.ipc.somaxconn, but it's not changing the max. Am I missing something?

Thanks!

© Server Fault or respective owner

Related posts about nginx

ModSecurity compile error on nginx

as seen on Server Fault - Search for 'Server Fault'
I'm trying to install ModSecurity on nginx with the following instructions : wget https://github.com/SpiderLabs/ModSecurity/archive/master.zip unzip master cd ModSecurity-master ./autogen.sh ./configure --enable-standalone-module And i got the following error : Checking plataform... Identified… >>> More
Cannot Start Nginx Compiled from Source

as seen on Server Fault - Search for 'Server Fault'
I am trying to compile Nginx from source based on the original compiled Nginx server running on my DigitalOcean server ( Ubuntu-14.04 64x ) but with a few extra modules. I can get everything installed smoothly but I can not get it to start. I am sure the ini is correct because I copied the original… >>> More
Nginx http_mp4_module seam installed but dont work

as seen on Server Fault - Search for 'Server Fault'
I try to use the http_mp4_module on my Ubuntu server but that didnt seem to work at all. When i check nginx -V i get : nginx version: nginx/1.1.19 TLS SNI support enabled configure arguments: --prefix=/etc/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-client-body-temp-path=/var/lib/nginx/body… >>> More
GeoIP and Nginx

as seen on Server Fault - Search for 'Server Fault'
I have a nginx with geoip, but it is not working rightly. The issue is the next: Nginx are getting geodata from $_SERVER['REMOTE_ADDR'] instead of $_SERVER['HTTP_X_HAPROXY_IP'], which have the real client ip. So, the reported geodata belongs to my server ip instead of client ip. Does anybody where… >>> More
Nginx1.6.1: Installing from source not running corectly

as seen on Server Fault - Search for 'Server Fault'
I just installed Nginx 1.6.1 from source but it didn't seem to installed correctly. Nginx is running if I service nginx status but when I do nginx -v it outputs command not found. Regular HTML page shows fine and there is no error in the error logs. I am on AWS Ec2 linux AMI. Here is my /etc/init… >>> More

Related posts about freebsd

FreeBSD performance tuning. Sysctls, loader.conf, kernel

as seen on Server Fault - Search for 'Server Fault'
I wanted to share knowledge of tuning FreeBSD via sysctl.conf/loader.conf/KENCONF. It was initially based on Igor Sysoev's (author of nginx) presentation about FreeBSD tuning up to 100,000-200,000 active connections. Tunings are for FreeBSD-CURRENT. Since 7.2 amd64 some of them are tuned well by… >>> More
Boot FreeBSD/FreeNAS (their bootloader) from isolinux?

as seen on Super User - Search for 'Super User'
I'm creating a multiboot cd but have trouble with the FreeNAS/FreeBSD boot loader. If the image has isolinux, its just basically to copy & paste their config, but with the FreeBSD loader its different. Can someone please help me with this one? :) Thanks! >>> More
FreeBSD 8 Kernel Configuration Error Using the VESA Option

as seen on Server Fault - Search for 'Server Fault'
I'm trying to reconfigure FreeBSD 8 (amd64) to allow for a high resolution terminal by following these instructions. The problem is that when I add the two lines: options VESA options SC_PIXEL_MODE and try to build: make buildkernel KERNCONF=VESAKERN I get the following error: /usr/src/sys/amd64/conf/VESAKERN:… >>> More
Ierrs on Network Interface - Pfsense/Freebsd

as seen on Server Fault - Search for 'Server Fault'
Hello all, We're using PfSense as an internal router/firewall (no connection to WAN). Using the Web-GUI, under Status --- Interfaces, there's one particular interface where I have some errors: In/out errors 3513/0 I then SSHed to the firewall to validate the info provided by the WebGUI and… >>> More
Mounting a share with spaces in FreeBSD fstab

as seen on Server Fault - Search for 'Server Fault'
I'm trying to mount a smb network share in fstab on FreeBSD, which works fine for a share without spaces, but fails if a space is in the name. I have replaced the space with \040 which is what everything on google has said, but that didn't help. Share name I'm trying to mount is "Data Backups". Share… >>> More